import { makeMap } from "@/utils/index";

// 参考https://github.com/vuejs/vue/blob/v2.6.10/src/platforms/web/server/util.js
const isAttr = makeMap(
  "accept,accept-charset,accesskey,action,align,alt,async,autocomplete," +
    "autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset," +
    "checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv," +
    "name,contenteditable,contextmenu,controls,coords,data,datetime,default," +
    "defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for," +
    "form,formaction,headers,height,hidden,high,href,hreflang,http-equiv," +
    "icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low," +
    "manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file," +
    "muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster," +
    "preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox," +
    "scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span," +
    "spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex," +
    "target,title,type,usemap,value,width,wrap"
);

function vModel(self, dataObject, defaultValue) {
  dataObject.props.value = defaultValue;

  dataObject.on.input = (val) => {
    self.$emit("input", val);
  };
}

const componentChild = {
  "el-button": {
    default(h, conf, key) {
      return conf[key];
    },
  },
  "el-input": {
    prepend(h, conf, key) {
      return <template slot="prepend">{conf[key]}</template>;
    },
    append(h, conf, key) {
      return <template slot="append">{conf[key]}</template>;
    },
  },
  "el-select": {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach((item) => {
        list.push(
          <el-option
            label={item.label}
            value={item.value}
            disabled={item.disabled}
          ></el-option>
        );
      });
      return list;
    },
  },
  "el-radio-group": {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach((item) => {
        if (conf.optionType === "button")
          list.push(
            <el-radio-button label={item.value}>{item.label}</el-radio-button>
          );
        else
          list.push(
            <el-radio label={item.value} border={conf.border}>
              {item.label}
            </el-radio>
          );
      });
      return list;
    },
  },
  "el-checkbox-group": {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach((item) => {
        if (conf.optionType === "button") {
          list.push(
            <el-checkbox-button label={item.value}>
              {item.label}
            </el-checkbox-button>
          );
        } else {
          list.push(
            <el-checkbox label={item.value} border={conf.border}>
              {item.label}
            </el-checkbox>
          );
        }
      });
      return list;
    },
  },
  "el-upload": {
    "list-type": (h, conf, key) => {
      const list = [];
      if (conf["list-type"] === "picture-card") {
        list.push(<i class="el-icon-plus"></i>);
      } else {
        list.push(
          <el-button size="small" type="primary" icon="el-icon-upload">
            {conf.buttonText}
          </el-button>
        );
      }
      if (conf.showTip) {
        list.push(
          <div slot="tip" class="el-upload__tip">
            只能上传不超过 {conf.fileSize}
            {conf.sizeUnit} 的{conf.accept}文件
          </div>
        );
      }
      return list;
    },
  },
};

export default {
  render(h) {
    const dataObject = {
      attrs: {},
      props: {},
      on: {},
      style: {},
    };
    const confClone = JSON.parse(JSON.stringify(this.conf));
    const children = [];

    const childObjs = componentChild[confClone.tag];
    if (childObjs) {
      Object.keys(childObjs).forEach((key) => {
        const childFunc = childObjs[key];
        if (confClone[key]) {
          children.push(childFunc(h, confClone, key));
        }
      });
    }

    Object.keys(confClone).forEach((key) => {
      const val = confClone[key];
      if (key === "vModel") {
        vModel(this, dataObject, confClone.defaultValue);
      } else if (dataObject[key]) {
        dataObject[key] = val;
      } else if (!isAttr(key)) {
        dataObject.props[key] = val;
      } else {
        dataObject.attrs[key] = val;
      }
    });
    return h(this.conf.tag, dataObject, children);
  },
  props: ["conf"],
};
